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J. MGDERMOTT. GAS ALARM BURNER.I

No. 374,614. V1a,1'.e11te d Deo. 13, 1887.

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GAS ALARM BURNER.

Patented' Deo. 13, 1887.

l l l l l l l L l I l l I 9 x u l l s l l r l x a UNITED? STATES PATENT Orrrcn.

JOHN MODERMOTT, OF KENDALL CREEK, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO GEORGE QE. BENNINGHOFF, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 374,614, dated December 13, 1887.

Application filed March S4, l87. Serial No. 232,260. (No model.)

.To aZZ whom, it may concern:

Be it known that I, JOHN McDnRMor'r, a Icitizen of the United States, residing at Kendall Greek, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Gas-Alarm Burners; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to apparatus for utilizing natural gas for illuminating, heating, and other purposes; and the object of my inven tion is to provide means whereby an acoustic alarm may be given upon the occurrence of excessive pressure.

To the above purpose my invention consists in a reed or other sounding alarm placed within the current of gas and so arranged as to be brought into operation when the pressure of gas becomes abnormal.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in

Figure l illustrates my invention applied to a Bunsen burner. Fig. 2 illustrates my invention applied to a heating or cooking apparatus. Fig. 3 is a side elevation of my improved attachment. Fig. 4 is a longitudinal section of the same. Fig. 5 is a detached view of the slide.. Fig. 6 is a sectional view on the line 6 6 of Fig. 3.

My improvement is designed to be used in connection with all of the various forms of illuminating and heating or cooking apparatusin which natural or other gas under pressure is utilized, so that an attendant may be instantly warned of the occurrence of excessive pressure, and thus promptly control the flow of gas.

In Ithe said drawings, A in Fig. l designates a Bunsen burner, and B in Fig. 2 designates a heating or cooking apparatus, both being supplied through a pipe, C.

In the' arrangement shown in Fig. 2 the pipe C is bent or curved circuitously, as indicated at c, and a valve, c', is placed as shown, so as to control the pressure and render it uniform.

D designates a tubular casing internally screwthreaded at its ends, as indicated at d d,

and having orifices formed in its sides, as

shown at d. Within this tubular casing is placed a diaphragm, E, transversely grooved, as at e, and lying contiguous to the openings or apertures d. At any suitable point of the diaphragm E is formed a small hole, c', and said diaphragm is also formed with a larger aperture, e2.

F is a slide which is inserted into one of the openings or orifices d', and slides along the groove e, said slide being formed with an opening or aperture,f, corresponding in size with the aperture e of the diaphragm E, and registering therewith when the slide is moved into closed position. A ilat enlarged head, f 2, is formed upon the outerend of the slide F, so as to afford a convenient hold for moving the same.

G designates the, casing of a reed, which is inserted into the hole or apertui'e e, said casing being ofthe form shown. Any desired form of reed may be used; but the form shown is usually preferable.

From the above description it will be seen that when the slide is forced inward the gas will dow only through the openingiu the slide and the smaller opening in the diaphragm. When the attendant is required to leave the apparatus, or when he is, for any reason, prevented from watching it, he pulls the slide either wholly or partially outward, so as to eX- pose the opening e2. In this event the gas iiows equally through both apertures in the diaphragm, and normally the alarm is not so'unded; but when excessive pressure occurs the surplus gas rushing through the opening e2 sounds the alarm. of air with the gas is permitted by the openings cl, before referred to.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-y 1. An improved attachment for Agas-conductors, consisting of an acoustic signal located within the current of gas, and operated by abnormal pressure of gas, substantially as and for the purpose described.

2. An improved attachment for natural-gas The necessary mixture l conductors, consisting of a reed or vihratory `the smaller opening in the diaphragm, sub- 1o tongue located Within the current of gas and stantiaily as and for the purpose specified.

' operated by excessive pressure of the gas, sub- In testimony whereof I ax my si gn ature in stantially as and for the purpose set forth. presence of two witnesses.

5 3. The combinationgwith thetubular casing,

with its apertures d', and the diaphragm wit-h JOHN MCDERMO DT' its smaller and larger openings e e,of the 211mm-, Witnesses: I casing set over the larger opening, e, and the GEORGE J. WOLF, slide F, having a-n aperture, f to register with JAMES GEORGE. 

